Brigma's page

I am getting to make a mounted combat specialist, not sure if fighter or cavalier, but what I am most interested in is how charging works in comibnation with other bonuses you getting from the mounted combat feat tree, like Trample. Also important is improved overrun? And can you overrun as part of the charge, as in I get my lance attack then trample you with my mount? The question(s) I have are kinda vague (sorry) but I just want to understand how the rules interact, especially if I had a unique mount that already had Trample or the Improved overrun feat itself.

Someone pointed out this archtype on the other thread and when looking it over I saw they get rogue talents at 10+. My question is specifically about improved evasion but can apply equally to any talent that has a prerequisite or a lesser version : can the witch take improved evasion at her first opportunity and get the full effect or wold she have to take it twice with the first time acting as regular evasion?